Impact of carrier-carrier scattering and carrier heating on pulse train dynamics of quantum dot semiconductor optical amplifiers

被引：36

作者：

Majer, Niels ^{[1
]}

Luedge, Kathy ^{[1
]}

Gomis-Bresco, Jordi ^{[2
]}

Dommers-Voelkel, Sabine ^{[2
]}

Woggon, Ulrike ^{[2
]}

Schoell, Eckehard ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Theoret Phys, D-10623 Berlin, Germany

[2] Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 13期

关键词：

light scattering; optical microscopy; optical pumping; quantum dot lasers; semiconductor optical amplifiers; LASERS; GAIN;

D O I：

10.1063/1.3643048

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the impact of carrier-carrier scattering on the gain recovery dynamics of a quantum dot (QD) semiconductor optical amplifier. Simulations, based on semiconductor Bloch equations with microscopically calculated Coulomb scattering rates between the carrier reservoir and the QDs, show a very good agreement with experimentally obtained pump-probe dynamics over a range of injection currents. With the microscopically obtained scattering rates at hand, we can conclude that fast cascading relaxation processes between the two-dimensional carrier reservoir and the QDs in combination with carrier heating enhancing the scattering efficiency drives the ultrafast gain recovery observed in QD based semiconductor devices. (C) 2011 American Institute of Physics. [doi:10.1063/1.3643048]

引用

页数：3

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